Pipe bending machine



' Dec. 15, 1931. F. G. GROSS PIPE BENDING MACHINE Filed Sept. 15, 1930 s Sheets-Sheet 1 Dec. 15, 1931. F. s. GROSS 1,837,040

PIPE BENDING MACHINE Filed Sept. 15, 1950 3 Sheets-Sheet 2 Q Q i Q i =in-i==' II: i I Milli! 2 E W W Patented Dec. 15, 1931 I UNITED STATES ffPA ENr OFFICE p 1mm) e. enoss, or cmcrnarnomo PIPE IBENDINGJIACHINE Application filed September 15,1930. Serial No. 482,050.

This invention relates to a pipe bending machine, the primary object of the invention being to provide means whereby a pipe may be accurately bent or formed into a particuular shape for a particular use.

device.

Another object of the invention is to provide means for bending a length of pipe, by a direct pressure exerted at a point intermediate the ends of the pipe, thereby insuring against the pipe bending too abruptly.

A still further object of the invention is to provide means whereby thedevice may be readily and easily clamped around a pipe section to be bent.

With the foregoing and other objectsin view, which will appear as the description proceeds, the invention resides in the combination and arrangementof parts andin the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention" herein disclosed, may be made within the scope of what is claimed, without from the spirit of the invention. 7

Referring to the drawings:

with the invention.

Figure 2 is a plan view thereof. Figure 3 is an end elevational view of the device. A, v

Figure 4 is a sectional view takenon line 4-4 of Figure 1. I 1

Figure 5 is a sectional view taken on line 5-5 of Figure 3. r a 1 Figure 6 is a sectional view through the central bending member. 7

Figure 7 is a sectional view taken on line 7-7 of Figure 2. j i t Figure 8 is an elevational view illustrating the removable section of one of the pipe.

clamps.

Referring to the drawings in detail, the

device comprises a wheel supported base indioated generallv bv the reference character departing 5, the wheels on which the device is mounted being indi'cated by the reference character 6, and as shown are thereof.

Supporting legs 7 are secured at the opmounted V at one end posite end of the base 5, the lengths of the legs (being such that the base 5 will be supported in a true horizontal plane at all times.

Extending from the base 5 and disposed at opposite ends thereof, are supporting arms 8 that are. supplied with bearings 9 disposed at the'upper ends thereof, the bearings 9 providing supports for the shafts 10 that extend laterally from the curved pipe support 11.

Thecurved. pipesupport 11 also includes a removable curved section 12 having lateral extensions 13 that are fitted in the sleeves 14fth'at are slidably mounted on the shafts-10, the sleeves being provided with spaced side members. 15 between which the extensions 13 are positioned.

'Keys'; 16 extend through openings in the side members 15 and overlie the upper edges of the extensions 13, to lock the section 12 of the pipe support in position," as shown by Figure of the drawings. As before stated,

these plpe'support's llare disposed adjacent to the endsof the. base 5, so that a pipe being bent may have its ends secured Within the pipe supports and held in such position dur- Figure 1 is a side elevational view of a pipe a bending machine constructed in accordance ing the bendin o eration.

. g P 4 Eye bolts: 17 are secured to the sections 12 by the sections 12 maybe readily and easily removed and replaced.

v Arranged adjacent to the side edges of the base 5 are bars 18 which provide guidesfor the movable base 19 which is formed with curved recesses to'receive the rollers 20 on which the base 19 is movably mounted.

under operation, is bent.-

The head 24 is provided with a movable of the pipe supports and afford means where- Chains 21 are secured at opposite ends of the p section 25 which is hingedly connected to the lower portion of the head, a key 26 being provided for securing the movable section of the head in position around a pipe being bent.

At the lower end of the cylinder 22 is a pipe 27 through which air under pressure is directed to the cylinder to act on the piston to move the piston upwardly to bend the pipe I held by the device.

From the foregoing it will be obvious that r due to the construction shown and described,

a pipe may be positioned with its ends in the 7 pipe supports, a portion of the pipe being k I positioned on the head 24 and secured in position in a manner as described. As air is forced into the cylinder 22, the piston 23 is forced upwardly, bending the pipe held by the device.

While I have shown and described the pipe supports of diameters to receive substantially large pipes, it is to be understood that removable sections may be positioned within the supports and head 24, the removable sections being of sizes to accommodate pipes of particular sizes, thereby adapting the machine for use in bending pipes of various diameters.

I claim:

1. A pipe bending machine comprising a base, upstanding arms secured to the base 1 near the ends of the base, bearings at the upper ends of the arms, shafts disposed within the bearings and having curved central portions to accommodate a pipe to be bent,

' removable curved members cooperating with til the curved portions of the shaft forclamping the pipe in position, and means onfthe base for gripping the pipe intermediate theends of the pipe, to bend the pipe. I

.2. -A pipe bending machinecomprising a base, supporting arms at the ends of the base, bearings on the supporting arms, shafts having their ends disposed within the bearings to pivotally support the shaft, said shafts having curved pipe receiving portions, disposed intermediate the ends thereof, a movable base on the first mentioned base, and means on the movable base for gripping and bending a pipe at a point intermediate its ends.

In testimony that I claimthe foregoing as my own, I have hereto aflixed my signature.

FRED G. GROSS. 

